vitamin d deficiency

Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html

---

Study Counts

Type	Study_count
Total_Studies	441
interventional	354
Observational	79
Registry	8

Studies over Time by Start Date

```

Interventional Trials

Intervention Type

intervention_type	Study_Count
Dietary Supplement	100
Drug	81
Drug|placebo	59
Dietary Supplement|placebo	57
Other	10
Dietary Supplement|Other	9
Drug|Other	8
Behavioral	5
Dietary Supplement|Drug|placebo	3
Dietary Supplement|Radiation	3
Device	2
Diagnostic Test	2
Procedure	2
Behavioral|Dietary Supplement|placebo	1
Behavioral|Other	1
Biological|Other	1
Combination Product|Dietary Supplement|Other	1
Dietary Supplement|Drug	1
Dietary Supplement|Drug|Other|Procedure	1
Dietary Supplement|Other|placebo	1
Dietary Supplement|Other|Procedure	1
Drug|Other|placebo	1
Genetic	1
Other|placebo	1
placebo	1
Radiation	1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Yearly studies for each intervention by start date

Studies by Country

Country	Study_Count
United States	148
NA	36
Canada	14
Denmark	10
Israel	9
China	8
Egypt	8
United Kingdom	8
Sweden	7
Austria	6
Turkey	6
France	5
Ireland	5
Jordan	5
Norway	5
Saudi Arabia	5
India	4
Iran, Islamic Republic of	4
Poland	4
Switzerland	4
Brazil	3
Germany	3
Lebanon	3
Mexico	3
Netherlands	3
Bangladesh	2
Chile	2
Finland	2
Indonesia	2
Pakistan	2
Slovenia	2
Spain	2
United Arab Emirates	2
Australia	1
Austria|Belgium	1
Austria|Canada|Chile	1
Brazil|United Kingdom	1
Estonia	1
Ethiopia	1
Germany|United Kingdom	1
Greece	1
Hong Kong	1
Hungary	1
Italy	1
Japan	1
Korea, Republic of	1
Malaysia	1
Mongolia	1
Qatar	1
Russian Federation	1
Singapore	1
Syrian Arab Republic	1
Taiwan	1
Thailand	1
United States|United Arab Emirates	1

Sites per Study

Site_count	Study_Count
1	319
2	20
3	6
4	1
5	1
7	1
8	1
9	1
15	1
18	1
20	1
47	1

Phase

Phase	Study_Count
N/A	183
Phase 4	65
Phase 3	40
Phase 2	34
Phase 1	17
Phase 2/Phase 3	6
Early Phase 1	5
Phase 1/Phase 2	4

Number of Arms

Number_of_Arms	Count_of_Studies
1	40
2	199
3	52
4	42
5	6
6	2
7	1
8	1
10	1
NA	10

Enrollment Metrics by Phase

Measure	Early.Phase.1	N.A	Phase.1	Phase.1.Phase.2	Phase.2	Phase.2.Phase.3	Phase.3	Phase.4
Min.	16.0	1.0000	10.0000	45.00	5.0000	10.00000	12.000	9.0000
1st Qu.	35.0	42.7500	23.0000	77.25	50.0000	49.50000	61.750	48.0000
Median	68.0	80.0000	55.0000	133.50	73.5000	70.00000	165.000	80.0000
Mean	102.2	171.6044	105.8235	125.75	130.2941	77.16667	305.425	105.8615
3rd Qu.	80.0	130.7500	89.0000	182.00	135.0000	95.00000	350.250	120.0000
Max.	312.0	6000.0000	597.0000	191.00	744.0000	167.00000	2400.000	360.0000

Trial Group Type

group_type	Group_Count
Experimental	334
Active Comparator	250
Placebo Comparator	182
No Intervention	41
Other	21
NA	10
Sham Comparator	1

Intervention Model

intervention_model	Study_Count
Parallel Assignment	278
Single Group Assignment	57
Crossover Assignment	10
Factorial Assignment	8
Sequential Assignment	1

Primary Purpose

primary_purpose	Study_Count
Treatment	203
Prevention	72
Basic Science	26
Supportive Care	11
Health Services Research	10
Other	9
NA	9
Diagnostic	8
Screening	6

Observational Studies

Studies by Country

Country	Study_Count
United States	21
NA	11
Turkey	8
Italy	4
Belgium	3
China	3
Israel	3
United Kingdom	3
Egypt	2
Mexico	2
Slovenia	2
Spain	2
Thailand	2
Austria	1
Denmark	1
France	1
Gabon	1
Haiti	1
Hong Kong	1
Korea, Republic of	1
Romania	1
Singapore	1
Sweden	1
Switzerland	1
Taiwan	1
United Arab Emirates	1

Sites per Study

Site_count	Study_Count
1	71
2	6
3	2

Enrollment Metrics

Measure	Observational
Min	11.000
1st Qu	53.000
Median	138.000
Mean	1604.329
3rd Qu	294.500
Max	39759.000

Observation Model

observational_model	Study_Count
Cohort	39
Case-Control	10
Case Control	10
Case-Only	8
Other	5
Ecologic or Community	4
NA	2
Family-Based	1

Time Perspective

time_perspective	Study_Count
Prospective	44
Cross-Sectional	26
Retrospective	7
Other	2

Registries

Studies by Country

Country	Study_Count
NA	2
Denmark	1
Israel	1
Spain	1
Taiwan	1
Turkey	1
United Kingdom	1

Sites per Study

Site_count	Study_Count
1	8

Enrollment Metrics

Measure	Registries
Min	50.00
1st Qu	96.00
Median	243.00
Mean	28043.12
3rd Qu	362.25
Max	222776.00

Registry Model

observational_model	Study_Count
Cohort	4
Case-Control	1
Case-Only	1
Case Control	1
Ecologic or Community	1

Time Perspective

time_perspective	Study_Count
Prospective	6
Cross-Sectional	1
Other	1

Follow-up

target_duration	Study_Count
1 Day	2
1 Year	1
12 Years	1
18 Months	1
33 Years	1
6 Months	1
6 Years	1

Overview of Studies

Interventional Trials

#If less then 500 trials

nct_id	brief_title	link	overall_status	source	primary_completion_date
NCT04461665	Effects of Vitamin D Supplementation on Immune Function in Infants	https://ClinicalTrials.gov/show/NCT04461665	Completed	Shih Chien University	2016-06-17
NCT03385356	Impact of Vitamin D Supplementation in Patients With Multiple Sclerosis	https://ClinicalTrials.gov/show/NCT03385356	Completed	University Medical Centre Maribor	2018-04-30
NCT03401541	25-Hydroxyvitamin D Pharmacokinetic Study	https://ClinicalTrials.gov/show/NCT03401541	Completed	Boston University	2019-04-01
NCT03380091	Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial	https://ClinicalTrials.gov/show/NCT03380091	Recruiting	University of California, San Francisco	2021-04-30
NCT03369379	Valuation of Efficacy and Safety of Vitamin D3 Use in 80 Women Diagnosed With Fibromyalgia. Using FIQ Score and VAS.	https://ClinicalTrials.gov/show/NCT03369379	Completed	Universidad Autonoma de Nuevo Leon	2017-12-31
NCT03342651	Preoperative Vitamin D Levels and Respiratory Complications of General Anesthesia	https://ClinicalTrials.gov/show/NCT03342651	Completed	T.C. ORDU ÃœNÄ°VERSÄ°TESÄ°	2016-04-01
NCT03339427	Intervention Study of Vitamin D Supplementation to Prevent Cardiovascular Disease	https://ClinicalTrials.gov/show/NCT03339427	Completed	Chinese PLA General Hospital	2015-01-31
NCT03334136	The Effect of Vitamin D Supplementation on Psoriasis Severity	https://ClinicalTrials.gov/show/NCT03334136	Recruiting	University Hospital of North Norway	2028-05-28
NCT03333564	Effect of Vitamin D3 and Omega-3FA on Estradiol	https://ClinicalTrials.gov/show/NCT03333564	Completed	Applied Science Private University	2017-02-28
NCT03318029	Vitamin D Supplementation and Sunlight Exposure in Brazilian Women Living in Opposite Latitudes (The D-SOL Study)	https://ClinicalTrials.gov/show/NCT03318029	Completed	University of Surrey	2017-09-25
NCT03310307	Vitamin D3 Treatment and Homocysteine Concentrations Among Overweight Reproductive Women	https://ClinicalTrials.gov/show/NCT03310307	Completed	Al-Balqa Applied University	2016-08-30
NCT03310242	Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels	https://ClinicalTrials.gov/show/NCT03310242	Completed	Seoul National University Hospital	2015-11-25
NCT03272126	Importance of Dosing Regimen for the Effect of Vitamin D Supplementation	https://ClinicalTrials.gov/show/NCT03272126	Completed	University of Tromso	2018-04-01
NCT03258086	Vitamin D in Diabetic Children	https://ClinicalTrials.gov/show/NCT03258086	Completed	Assiut University	2017-08-31
NCT03232216	Vitamin D Supplementation and Tibia Fracture. Does it Improve Healing Rate?	https://ClinicalTrials.gov/show/NCT03232216	Recruiting	Hospital del Trabajador de Santiago	2021-08-18
NCT03213886	The Effect of Supplementation of Vitamin D Deficiency in Older People With Acute Hip Fracture:	https://ClinicalTrials.gov/show/NCT03213886	Recruiting	Consorci Sanitari de Terrassa	2019-04-20
NCT03193944	Vitamin D Supplementation on Metabolic Syndrome Indicators Among Older Adults, Alborz Province, Iran	https://ClinicalTrials.gov/show/NCT03193944	Completed	Alborz Medical University	2017-05-10
NCT03188796	The VITDALIZE Study: Effect of High-dose Vitamin D3 on 28-day Mortality in Adult Critically Ill Patients	https://ClinicalTrials.gov/show/NCT03188796	Recruiting	Medical University of Graz	2022-12-31
NCT03176849	A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT	https://ClinicalTrials.gov/show/NCT03176849	Enrolling by invitation	Phoenix Children’s Hospital	2019-09-01
NCT03151174	Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes	https://ClinicalTrials.gov/show/NCT03151174	Completed	Virginia Polytechnic Institute and State University	2018-05-15
NCT03144128	Vitamin D for Muscle Metabolic Function in Cancer Cachexia	https://ClinicalTrials.gov/show/NCT03144128	Recruiting	University of Kentucky	2021-12-31
NCT03141593	Oral Vitamin D Substitution Weekly or Monthly and Adherence	https://ClinicalTrials.gov/show/NCT03141593	Completed	University Hospital, Basel, Switzerland	2018-10-31
NCT03134417	Magnesium and Vitamin D Supplementation and Cardiometabolic Outcomes	https://ClinicalTrials.gov/show/NCT03134417	Recruiting	Drexel University	2019-12-31
NCT03101150	Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia	https://ClinicalTrials.gov/show/NCT03101150	Completed	King Fahad Medical City	2014-10-31
NCT03099759	Vitamin D Raising and Maintaining Blood Serum 25(OH)D3 Levels	https://ClinicalTrials.gov/show/NCT03099759	Completed	The Cleveland Clinic	2017-05-31
NCT03096314	Vitamin D to Improve Outcomes by Leveraging Early Treatment	https://ClinicalTrials.gov/show/NCT03096314	Completed	Massachusetts General Hospital	2018-12-11
NCT03087149	Monitored vs Standard Supplementation of Vitamin D in Preterm Infants	https://ClinicalTrials.gov/show/NCT03087149	Recruiting	Princess Anna Mazowiecka Hospital, Warsaw, Poland	2019-12-31
NCT03070483	Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study	https://ClinicalTrials.gov/show/NCT03070483	Completed	Loyola University	2018-11-01
NCT03038516	‘Palliative-D’ Vitamin D to Palliative Cancer Patients	https://ClinicalTrials.gov/show/NCT03038516	Completed	Stockholm County Council, Sweden	2020-06-09
NCT03035084	Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena?	https://ClinicalTrials.gov/show/NCT03035084	Completed	King Faisal Specialist Hospital & Research Center	2017-11-20
NCT03032328	Vitamin D Deficiency and Dysautonomia	https://ClinicalTrials.gov/show/NCT03032328	Active, not recruiting	Wake Forest University Health Sciences	2021-06-30
NCT03018132	Preeclampsia Research on Vitamin D, Inflammation, & Depression	https://ClinicalTrials.gov/show/NCT03018132	Recruiting	Cedars-Sinai Medical Center	2019-04-01
NCT02956408	Efficacy of Vitamin D Supplementation in Obese Children	https://ClinicalTrials.gov/show/NCT02956408	Completed	Columbia University	2019-10-30
NCT02954549	Vitamin D Supplementation in Warfighters	https://ClinicalTrials.gov/show/NCT02954549	Completed	Madigan Army Medical Center	2018-06-29
NCT02941185	Multi-dose Vitamin D Supplementation in Preterm Infants	https://ClinicalTrials.gov/show/NCT02941185	Completed	Zekai Tahir Burak Women’s Health Research and Education Hospital	2016-12-31
NCT02930434	Effects of Antarctic Environment on Vitamin D Status and Health Risk Biomarkers of Its Inhabitants	https://ClinicalTrials.gov/show/NCT02930434	Completed	Pontificia Universidad Catolica de Chile	2017-12-10
NCT02922803	Vitamin D and Physical Performance Before and After Intervention and Birth Outcome in Pregnant Somali and Swedish Women	https://ClinicalTrials.gov/show/NCT02922803	Completed	Uppsala University	2016-08-31
NCT02890823	Effect of Three Different Doses of Oral Cholecalciferol on 25-Hydroxyvitamin D Changes Among Epilepsy Patients With Hypovitaminosis D	https://ClinicalTrials.gov/show/NCT02890823	Completed	Chulalongkorn University	2016-03-31
NCT02881957	Hypovitaminosis D in Neurocritical Patients	https://ClinicalTrials.gov/show/NCT02881957	Completed	University of Utah	2018-10-10
NCT02876315	The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults	https://ClinicalTrials.gov/show/NCT02876315	Active, not recruiting	Oregon State University	2020-12-31
NCT02822651	Hypovitaminosis D Prediction Score	https://ClinicalTrials.gov/show/NCT02822651	Completed	Hospices Civils de Lyon	2017-11-17
NCT02805907	Efficacy of Calcifediol Supplementation in Asthma Control in Asthmatic Patients With Vitamin D Deficiency (ACViD)	https://ClinicalTrials.gov/show/NCT02805907	Completed	MurciaSalud	2017-01-31
NCT02802449	To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans	https://ClinicalTrials.gov/show/NCT02802449	Completed	Charles Drew University of Medicine and Science	2016-03-31
NCT02783924	The GLOBAL Vitamin D Study. A Genomic, Transcriptomic, Proteomic and Metabolomic Approach	https://ClinicalTrials.gov/show/NCT02783924	Completed	University of Tromso	2017-09-30
NCT02750293	The Effect of Vitamin D Supplementation on Cardiovascular Risk Factors	https://ClinicalTrials.gov/show/NCT02750293	Completed	University of Tromso	2017-08-31
NCT02735200	Topical Delivery of Vitamin D3 as Vitamin D Supplementation	https://ClinicalTrials.gov/show/NCT02735200	Completed	Dammam University	2016-12-31
NCT02714361	A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women	https://ClinicalTrials.gov/show/NCT02714361	Completed	University of Chester	2016-04-30
NCT02704624	Effects of Supplementation of Vitamin D in Patients With Crohn`s Disease	https://ClinicalTrials.gov/show/NCT02704624	Enrolling by invitation	Federal University of Juiz de Fora	2020-08-31
NCT02678364	Effect of Vitamin D-biofortified Eggs on Wintertime Serum 25-hydroxyvitamin D in Adults: Randomized Controlled Trial	https://ClinicalTrials.gov/show/NCT02678364	Completed	University College Cork	2015-12-31
NCT02676674	Vitamin D Levels Following Topical Application of Vitamin D Ointment	https://ClinicalTrials.gov/show/NCT02676674	Completed	University of Minnesota	2017-06-15
NCT02662491	Effects of Vitamin D and Calcium Supplementation on Health and Well-being of Vitamin D Deficient UAE Citizens	https://ClinicalTrials.gov/show/NCT02662491	Completed	United Arab Emirates University	2019-03-31
NCT02661191	Vitamin D Deficiency and Asthma Exacerbation	https://ClinicalTrials.gov/show/NCT02661191	Completed	University of Turin, Italy	2013-03-31
NCT02656121	Correction of Vitamin D Deficiency and Its Effect on Ovulation Induction in Women With PCOS (VIDEO): A Feasibility RCT	https://ClinicalTrials.gov/show/NCT02656121	Completed	Ain Shams University	2018-11-30
NCT02631629	Food-based Solutions for Optimal Vitamin D Nutrition and Health	https://ClinicalTrials.gov/show/NCT02631629	Completed	Technical University of Denmark	2016-05-31
NCT02621320	Vitamin D Supplementation in Wheelchair Indoor Athletes	https://ClinicalTrials.gov/show/NCT02621320	Completed	Swiss Paraplegic Centre Nottwil	2016-07-31
NCT02613884	Safety, Efficacy, and Feasibility of High-dose Cholecalciferol in Pediatric Patients With Cystic Fibrosis	https://ClinicalTrials.gov/show/NCT02613884	Completed	Johns Hopkins All Children’s Hospital	2019-11-25
NCT01325610	Vitamin D Effect on Calcium Absorption on Persons on Hemodialysis	https://ClinicalTrials.gov/show/NCT01325610	Completed	Creighton University	2012-01-31
NCT02590614	Genetic, Dietary and Environmental Influences on Vitamin D Metabolism	https://ClinicalTrials.gov/show/NCT02590614	Completed	Milton S. Hershey Medical Center	2018-05-31
NCT02589444	Vitamin D and Microbiota in Cystic Fibrosis	https://ClinicalTrials.gov/show/NCT02589444	Completed	Emory University	2017-02-28
NCT02572960	Physiologic Interactions Between the Adrenal- and the Parathyroid Glands	https://ClinicalTrials.gov/show/NCT02572960	Completed	University of Aarhus	2017-05-31
NCT03403933	Study of the Effect of Calcifediol Supplementation on Cardiopathic Patients Undergoing Major Orthopedic Surgery (Vitamina D).	https://ClinicalTrials.gov/show/NCT03403933	Completed	Istituto Ortopedico Galeazzi	2017-09-23
NCT02035423	Community Interventional Trial (CITFOMIST)	https://ClinicalTrials.gov/show/NCT02035423	Completed	Tehran University of Medical Sciences	2011-03-31
NCT03403647	Effect of Vitamin D on Everolimus Trough Concentrations Among Heart Transplanted Patients	https://ClinicalTrials.gov/show/NCT03403647	Completed	Sheba Medical Center	2019-04-10
NCT03402698	Vitamin D Supplementation in Children	https://ClinicalTrials.gov/show/NCT03402698	Completed	Children’s Memorial Health Institute, Poland	2018-05-26
NCT01317940	Nutrition and Body Composition in Acute Lymphoblastic Leukemia	https://ClinicalTrials.gov/show/NCT01317940	Completed	Children’s Hospital Los Angeles	2014-12-31
NCT02563015	Can Correction of Low Vitamin D Status in Infancy Program for a Leaner Body Composition?	https://ClinicalTrials.gov/show/NCT02563015	Active, not recruiting	McGill University	2022-02-20
NCT03395171	Vitamin D3 Supplementation and Stress Fracture Occurrence in High-Risk Collegiate Athletes	https://ClinicalTrials.gov/show/NCT03395171	Completed	Prisma Health-Midlands	2016-07-01
NCT02553447	Cholecalciferol in Treating Patients With Newly Diagnosed Non-Hodgkin Lymphoma or Chronic Lymphocytic Leukemia With Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT02553447	Recruiting	University of Nebraska	2020-08-28
NCT02553044	Change in Free 25(OH)D After High Dose in Vitamin D Deficient Postmenopausal Women	https://ClinicalTrials.gov/show/NCT02553044	Completed	Sheffield Teaching Hospitals NHS Foundation Trust	2018-08-31
NCT02543671	Investigation of Vitamin D3 Enriched, Reduced-fat Yellow Cheese Efficacy to Prevent Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT02543671	Completed	Harokopio University	2015-03-31
NCT02534064	Effect of Consumption of Yogurt Fortified in Calcium and Vit. D on Circulating Levels of 25OHD in Postmenopausal Women	https://ClinicalTrials.gov/show/NCT02534064	Completed	Yoplait France SAS	2015-10-31
NCT02506439	Nutritional Requirements for Vitamin D in Pregnant Women	https://ClinicalTrials.gov/show/NCT02506439	Completed	University College Cork	2017-04-01
NCT02485197	Muscle Metabolic Function in Older Adults With Different Vitamin D Status Before and After Exercise	https://ClinicalTrials.gov/show/NCT02485197	Completed	University of Kentucky	2013-10-31
NCT02483026	Nutritional Deficiencies Preventive Treatment Prior to Laparoscopic Sleeve Gastrectomy	https://ClinicalTrials.gov/show/NCT02483026	Completed	Hadassah Medical Organization	2019-12-01
NCT02477956	Effect of a Monthly High Dose of Vitamin D3 on Bariatric Surgery Patients	https://ClinicalTrials.gov/show/NCT02477956	Completed	Texas Tech University	2013-11-30
NCT02460380	The Effects of Vitamin D on Angiogenic Factors in Women With Polycystic Ovary Syndrome	https://ClinicalTrials.gov/show/NCT02460380	Completed	Maimonides Medical Center	2015-03-31
NCT02460211	Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D	https://ClinicalTrials.gov/show/NCT02460211	Active, not recruiting	Intermountain Health Care, Inc.	2018-10-01
NCT02457247	Calcichew D3 Preference Study in Participants Eligible for Calcium and Vitamin D Supplementation.	https://ClinicalTrials.gov/show/NCT02457247	Completed	Takeda	2015-08-31
NCT02452762	Rapid Normalization of Vitamin D in Critically Ill Children: A Phase II Dose Evaluation Randomized Controlled Trial	https://ClinicalTrials.gov/show/NCT02452762	Completed	Children’s Hospital of Eastern Ontario	2017-11-30
NCT02451787	The ‘Hidden’ Biological Impact of Vitamin D Deficiency: a Biomarker Study; Part 2	https://ClinicalTrials.gov/show/NCT02451787	Completed	The Hong Kong Polytechnic University	2016-07-31
NCT02443246	A Prospective, Multi-center Study to Evaluate the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT02443246	Completed	Kwang Dong Pharmaceutical co., ltd.	2015-08-31
NCT02434380	Effect of Vitamin D Replacement on Maternal and Neonatal Outcomes	https://ClinicalTrials.gov/show/NCT02434380	Active, not recruiting	American University of Beirut Medical Center	2018-10-31
NCT02414529	Efficacy of Vitamin D Therapy on Glucose Homeostasis in Obese Adolescents	https://ClinicalTrials.gov/show/NCT02414529	Completed	NYU Langone Health	2015-10-31
NCT02404623	The Effect of Vitamin D Administration to Premature Infants on Vitamin D Status and Respiratory Morbidity	https://ClinicalTrials.gov/show/NCT02404623	Completed	Soroka University Medical Center	2018-02-12
NCT02395081	Trial of Vitamin D Supplements to Raise Calcidiol Levels of Pregnant Women in Mongolia	https://ClinicalTrials.gov/show/NCT02395081	Completed	Brigham and Women’s Hospital	2016-12-31
NCT02362269	Personalized Vitamin D Supplementation in European and African Americans	https://ClinicalTrials.gov/show/NCT02362269	Completed	University of Wisconsin, Madison	2019-05-03
NCT02360644	Drug Metabolizing Enzyme and Transporter Function in Chronic Kidney Disease	https://ClinicalTrials.gov/show/NCT02360644	Active, not recruiting	University of Colorado, Denver	2020-09-30
NCT02349282	The Effect of Calcifediol (Hy.D 25 SD/S) and Vitamin D3 on Muscle Strength in a Frail Elderly Population	https://ClinicalTrials.gov/show/NCT02349282	Completed	Wageningen University	2015-12-31
NCT02328404	The Effect of Vitamin D Supplementation Among Overweight Jordanian Women With Polycystic Ovary Syndrome (PCOS)	https://ClinicalTrials.gov/show/NCT02328404	Completed	Hayat Pharmaceutical Co. PLC	2014-09-30
NCT02297568	Vitamin D Supplementation During Lactation	https://ClinicalTrials.gov/show/NCT02297568	Completed	Rajavithi Hospital	2015-06-30
NCT02293187	Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function	https://ClinicalTrials.gov/show/NCT02293187	Completed	Tufts University	2017-09-13
NCT02282813	Extension Study of CTAP101-CL-3001 or CTAP101-CL-3002	https://ClinicalTrials.gov/show/NCT02282813	Completed	OPKO Health, Inc.	2015-05-31
NCT02275650	The Role of Narrowband Ultraviolet B Exposure in the Maintenance of Vitamin D Levels During Winter	https://ClinicalTrials.gov/show/NCT02275650	Completed	Joint Authority for Päijät-Häme Social and Health Care	2014-05-31
NCT02271971	Effect of Vitamin D Supplementation on Metabolic Parameters of Patients With Psoriasis	https://ClinicalTrials.gov/show/NCT02271971	Completed	Pontificia Universidad Catolica de Chile	2015-04-30
NCT02234544	Effect of an Inhibitor of Cholesterol Absorption on Vitamin D Levels	https://ClinicalTrials.gov/show/NCT02234544	Completed	Federal University of Rio Grande do Sul	2015-04-30
NCT02217553	The Effect of Vitamin D Supplementation on HIV-associated Platelet Hyperreactivity	https://ClinicalTrials.gov/show/NCT02217553	Completed	Universitas Padjadjaran	2014-02-28
NCT02214563	Cholecalciferol Supplementation for Anemia and Mineral and Bone Disorder in Hemodialysis Patients	https://ClinicalTrials.gov/show/NCT02214563	Completed	Osaka University	2016-03-31
NCT02210884	Maternal Vit D Supplements & Infant and Maternal Biomarkers & Outcomes in Southern Ethiopia	https://ClinicalTrials.gov/show/NCT02210884	Completed	Oklahoma State University	2016-09-30
NCT02186535	The Role of Vitamin D in Female Reproductive Tract Immunity	https://ClinicalTrials.gov/show/NCT02186535	Completed	CONRAD	2015-07-31
NCT02186106	Dosage Calculation for Vitamin D Treatment	https://ClinicalTrials.gov/show/NCT02186106	Completed	Bispebjerg Hospital	2013-06-30
NCT02186028	Effect of Oral Daily Supplementation With 400 IU Vs 200 IU of Vitamin D in Term Healthy Neonates	https://ClinicalTrials.gov/show/NCT02186028	Completed	Lady Hardinge Medical College	2015-06-30
NCT02168660	Correction of Vitamin D Levels and Its Effect on Insulin Resistance and Weight Gain in Obese Youth	https://ClinicalTrials.gov/show/NCT02168660	Completed	University of Texas Southwestern Medical Center	2013-09-30
NCT02158143	A Single High-dose Oral Supplement of Vitamin D in Young Chinese	https://ClinicalTrials.gov/show/NCT02158143	Completed	Chinese Academy of Sciences	2014-04-30
NCT02145195	The Effect of Vitamin D Supplements on Vitamin D Status, Cardiometabolic Health and Immune Defense in Danish Children	https://ClinicalTrials.gov/show/NCT02145195	Completed	University of Copenhagen	2015-03-31
NCT02136771	Styrian Vitamin D Hypertension Trial	https://ClinicalTrials.gov/show/NCT02136771	Completed	Medical University of Graz	2014-08-31
NCT02135913	Roles of Vitamin D and HDL in Obese Children	https://ClinicalTrials.gov/show/NCT02135913	Completed	University of Kentucky	2017-04-26
NCT02132442	Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes	https://ClinicalTrials.gov/show/NCT02132442	Completed	University of Massachusetts, Worcester	2016-10-31
NCT02118129	Vitamin D Among Young Adults: an Intervention Study Using a Mobile ‘App’.	https://ClinicalTrials.gov/show/NCT02118129	Completed	University of Guelph	2015-12-31
NCT02101151	Effect of Vitamin D Supplementation on the Metabolic Control and Body Composition of Type 2 Diabetes Subjects in Ajman (UAE)	https://ClinicalTrials.gov/show/NCT02101151	Completed	Rashid Centre for Diabetes and Research	2012-12-31
NCT02099955	Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI	https://ClinicalTrials.gov/show/NCT02099955	Completed	James J. Peters Veterans Affairs Medical Center	2015-12-31
NCT02091219	Effects of Vitamin D3 Versus 25OHD3 on Mineral Metabolism and Immune Function	https://ClinicalTrials.gov/show/NCT02091219	Recruiting	University of California, Los Angeles	2019-06-30
NCT02069990	Controlled, Randomized, Four-arm Comparative, Open Label, Multi-centric Clinical Trial to Compare the Efficacy and Safety Parameters of the Once-a-week or Once-a-month Administered 7000 IU, or 30000 IU Vitamin D (Cholecalciferol) to a 1000 IU Dosage Applied Daily in Vitamin D Deficient Patients	https://ClinicalTrials.gov/show/NCT02069990	Completed	Semmelweis University	2013-09-30
NCT01315366	Hypovitaminosis D : A Link Between Bone/Mineral and Fat/Fuel Metabolism	https://ClinicalTrials.gov/show/NCT01315366	Completed	American University of Beirut Medical Center	2014-08-31
NCT01306656	Vitamin D Repletion in Primary Hyperparathyroidism	https://ClinicalTrials.gov/show/NCT01306656	Completed	Columbia University	2017-02-28
NCT01295879	Vitamin D Repletion in Stone Formers With Hypercalciuria	https://ClinicalTrials.gov/show/NCT01295879	Completed	New York Presbyterian Hospital	2011-04-30
NCT01292720	Vitamin D Supplementation in Chronic Stable Heart Failure	https://ClinicalTrials.gov/show/NCT01292720	Completed	Medical University of Graz	2013-10-31
NCT01287455	The Effect of Vitamin D Replacement on Airway Reactivity, Allergy and Inflammatory Mediators in Exhaled Breath Condensate in Vitamin D Deficient Asthmatic Children	https://ClinicalTrials.gov/show/NCT01287455	Completed	Rambam Health Care Campus	2012-02-29
NCT03356873	Impact of Correction of Vitamin D Deficiency in Oxidative Stress in Patients With Prediabetes (VICOX)	https://ClinicalTrials.gov/show/NCT03356873	Recruiting	Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran	2019-09-01
NCT03608488	The Effect of Vitamin D and Exercise on Balance in Postmenopausal Women	https://ClinicalTrials.gov/show/NCT03608488	Completed	Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey	2019-07-12
NCT02009748	Vitamin D Supplementation in Cirrhotic Patients	https://ClinicalTrials.gov/show/NCT02009748	Completed	Medical University of Graz	2014-08-31
NCT02008201	Vitamin D Status and Supplementation in Athletes	https://ClinicalTrials.gov/show/NCT02008201	Completed	Wageningen University	2014-04-30
NCT01998763	Vitamin D Intervention Trial in Healthy Chinese, Phase II	https://ClinicalTrials.gov/show/NCT01998763	Completed	Chinese Academy of Sciences	2014-05-31
NCT01993537	The Role of Vitamin D in the Pathophysiology of Chronic Failure	https://ClinicalTrials.gov/show/NCT01993537	Completed	Ottawa Heart Institute Research Corporation	2016-01-31
NCT01992133	Effects of Vitamin D Supplementation on Glucose Metabolism in Women With Former Gestational Diabetes Mellitus	https://ClinicalTrials.gov/show/NCT01992133	Completed	RCSI & UCD Malaysia Campus	2012-08-31
NCT01991054	The Effects of Vitamin D Supplementation on Patients With Type 2 Diabetes and Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT01991054	Completed	HaEmek Medical Center, Israel	2017-12-31
NCT01990872	Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults	https://ClinicalTrials.gov/show/NCT01990872	Completed	University College Cork	2013-11-30
NCT01971801	Vitamin D Supplementation in Older Adults With Urinary Incontinence	https://ClinicalTrials.gov/show/NCT01971801	Completed	University of Alabama at Birmingham	2017-08-31
NCT01930539	Treatment of Vitamin D Deficiency in Intestinal Rehabilitation Clinic Patients With a Portable Ultraviolet B Lamp	https://ClinicalTrials.gov/show/NCT01930539	Completed	University of Nebraska	2015-06-30
NCT01924910	A Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Status in Healthy Adults	https://ClinicalTrials.gov/show/NCT01924910	Completed	Emory University	2013-12-31
NCT01910792	Ultraviolet Light And Vitamin D In Subjects With Fat Malabsorption Or After Gastric Bypass Surgery	https://ClinicalTrials.gov/show/NCT01910792	Completed	Boston University	2014-02-28
NCT01909063	A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice	https://ClinicalTrials.gov/show/NCT01909063	Completed	Boston University	2008-01-31
NCT01896544	Cholecalciferol Supplementation for Sepsis in the ICU	https://ClinicalTrials.gov/show/NCT01896544	Completed	Massachusetts General Hospital	2014-08-31
NCT01877577	Supplementation of Vitamin D3 in Patients With Inflammatory Bowel Diseases and Hypovitaminosis D	https://ClinicalTrials.gov/show/NCT01877577	Completed	University of California, San Francisco	2013-07-31
NCT01855321	Effects of Treating Vitamin D Deficiency in Poorly Controlled Type 2 Diabetes	https://ClinicalTrials.gov/show/NCT01855321	Completed	University of Florida	2015-03-31
NCT01848236	Effects of Vitamin D Insufficiency in Man	https://ClinicalTrials.gov/show/NCT01848236	Completed	University of California, Los Angeles	2020-02-29
NCT01845142	Immunologic Action of a Single Dose Cholecalciferol	https://ClinicalTrials.gov/show/NCT01845142	Completed	Charite University, Berlin, Germany	2013-05-31
NCT01838447	Prevention of Vitamin D Deficiency Following Pediatric CHD Surgery: a Phase II Dose Evaluation Randomized Controlled Trial Comparing Usual Care With a High Dose Pre-operative Supplementation Regimen Based on the Institute of Medicine Daily Upper Tolerable Intake Level	https://ClinicalTrials.gov/show/NCT01838447	Completed	Children’s Hospital of Eastern Ontario	2015-12-31
NCT01827345	Vitamin D as a Supplement Against Falls in Elderly Study	https://ClinicalTrials.gov/show/NCT01827345	Completed	University of Florida	2016-04-30
NCT01817036	Vitamin D Intervention Trial in Healthy Chinese	https://ClinicalTrials.gov/show/NCT01817036	Completed	Chinese Academy of Sciences	2013-05-31
NCT01815437	Evaluating Vitamin D Content in Mushrooms	https://ClinicalTrials.gov/show/NCT01815437	Completed	Boston University	2013-06-30
NCT01797302	Vitamin D and Vascular Health in Children	https://ClinicalTrials.gov/show/NCT01797302	Completed	University of Pittsburgh	2018-08-13
NCT01784029	Treatment Study of Vitamin D Deficiency in Adolescents	https://ClinicalTrials.gov/show/NCT01784029	Completed	Montefiore Medical Center	2014-07-31
NCT01778114	Availability of Vitamin D in Orange Juice	https://ClinicalTrials.gov/show/NCT01778114	Completed	Boston University	2007-06-30
NCT01746264	Effect of Vitamin D Supplementation on Endothelial Function in Obese Adolescents	https://ClinicalTrials.gov/show/NCT01746264	Completed	Mayo Clinic	2013-12-31
NCT01741324	Comparing Different Amounts of Vitamin D Supplementation to Preschool Children Living in Northern and Southern Sweden	https://ClinicalTrials.gov/show/NCT01741324	Completed	Umeå University	2013-04-30
NCT01741233	The Genetics Behind Vitamin D Status (VitDgen)	https://ClinicalTrials.gov/show/NCT01741233	Completed	Technical University of Denmark	2013-03-31
NCT01741181	Vitamin D Supplementation in Patients With Diabetes Mellitus Type 2	https://ClinicalTrials.gov/show/NCT01741181	Completed	Tan Tock Seng Hospital	2014-11-30
NCT01726777	Effect of Vitamin D Supplementation on Glucose Tolerance in Subjects at Risk for Diabetes With Low Vitamin D.	https://ClinicalTrials.gov/show/NCT01726777	Completed	University of Toronto	2015-09-30
NCT01721915	Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism	https://ClinicalTrials.gov/show/NCT01721915	Completed	Medical University of Graz	2017-10-12
NCT01704079	Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency	https://ClinicalTrials.gov/show/NCT01704079	Completed	OPKO Health, Inc.	2014-08-31
NCT01697228	The Effects of Vitamin D on Glycemic Control and Proinflammatory Markers in Adolescents With T1DM	https://ClinicalTrials.gov/show/NCT01697228	Completed	Children’s Hospital Los Angeles	2014-03-31
NCT01696526	Bioefficiency of of Conventional Fish and Vitamin D Fortified Fish	https://ClinicalTrials.gov/show/NCT01696526	Completed	Martin-Luther-Universität Halle-Wittenberg	2012-12-31
NCT01694355	The Impact of Severe Vitamin D Deficiency and Its Correction on Bone Mineral Density (BMD) in Postmenopausal Women	https://ClinicalTrials.gov/show/NCT01694355	Completed	Soroka University Medical Center	2018-10-31
NCT01691833	The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates	https://ClinicalTrials.gov/show/NCT01691833	Completed	Atrium Health	2017-01-31
NCT01689779	High Dose Preoperative Cholecalciferol Supplementation and Perioperative Vitamin D Status	https://ClinicalTrials.gov/show/NCT01689779	Completed	Massachusetts General Hospital	2015-05-31
NCT01688102	The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile	https://ClinicalTrials.gov/show/NCT01688102	Completed	Rockefeller University	2015-07-31
NCT04120064	Treatment of Vitamin D Deficiency With Large Bolus Cholecalciferol	https://ClinicalTrials.gov/show/NCT04120064	Recruiting	Parkview Medical Center	2020-12-31
NCT01656070	Vitamin D Supplementation in HIV-infected Youth	https://ClinicalTrials.gov/show/NCT01656070	Completed	University of Milan	2012-07-31
NCT01655810	Vitamin D, Cardiovascular Disease, and African Americans	https://ClinicalTrials.gov/show/NCT01655810	Completed	Washington University School of Medicine	2018-02-09
NCT01651000	Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency	https://ClinicalTrials.gov/show/NCT01651000	Completed	OPKO Health, Inc.	2014-07-31
NCT01639222	Human Pharmacology Trial of Calcium-vitamin D3 Tablet in Healthy Participants	https://ClinicalTrials.gov/show/NCT01639222	Completed	Takeda	2012-08-31
NCT01638494	Calcium and Vitamin D Intakes in Children	https://ClinicalTrials.gov/show/NCT01638494	Completed	Federico II University	2009-02-28
NCT01636570	Vitamin D3 Supplementation for Heart Failure Patients	https://ClinicalTrials.gov/show/NCT01636570	Completed	Saint Patrick Hospital	2015-04-30
NCT01633853	Efficacy of Vitamin D2 to Treat Chronic Kidney Disease Mineral and Bone Disorder	https://ClinicalTrials.gov/show/NCT01633853	Completed	Capital Medical University	2015-09-30
NCT01600430	Vitamin D Supplementation for Extremely Preterm Infants	https://ClinicalTrials.gov/show/NCT01600430	Completed	University of Alabama at Birmingham	2014-12-31
NCT01596842	Effect of Omega-3 Fatty Acid on Vitamin D Activation	https://ClinicalTrials.gov/show/NCT01596842	Completed	Dong-A University	2012-12-31
NCT01583621	Vitamin D Supplementation in Overweight/Obese African American Adults and Youth (D-SUNNY)	https://ClinicalTrials.gov/show/NCT01583621	Completed	Augusta University	2012-11-30
NCT01570309	Vitamin D Repletion in Coronary Artery Disease	https://ClinicalTrials.gov/show/NCT01570309	Completed	New York City Health and Hospitals Corporation	2011-03-31
NCT01568255	Is Treatment of Vitamin D Deficiency Associated With Resolution of Statin-Induced Muscular Symptoms	https://ClinicalTrials.gov/show/NCT01568255	Recruiting	Cedars-Sinai Medical Center	2021-03-31
NCT01549938	Cholecalciferol Intervention to Prevent Respiratory Infections Study	https://ClinicalTrials.gov/show/NCT01549938	Completed	Menzies Institute for Medical Research	2012-10-31
NCT01546103	Vitamin D3 Supplementation Pilot Study	https://ClinicalTrials.gov/show/NCT01546103	Completed	Children’s Hospital of Philadelphia	2012-09-30
NCT01537809	Impact of Vitamin D Supplementation on Cardiometabolic Risk Factors [The Daily D Health Study]	https://ClinicalTrials.gov/show/NCT01537809	Completed	Tufts University	2013-12-31
NCT01535508	Open Label Clinical Trial of Vitamin D in Children With Autism	https://ClinicalTrials.gov/show/NCT01535508	Completed	University of California, San Francisco	2015-09-30
NCT01524874	Comparative Effectiveness of Vitamin D and Repletion Strategies	https://ClinicalTrials.gov/show/NCT01524874	Completed	Bastyr University	2011-09-30
NCT01519986	The Effect of Fat on Vitamin D Absorption	https://ClinicalTrials.gov/show/NCT01519986	Completed	Federal University of Rio Grande do Sul	2011-10-31
NCT01508845	A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption	https://ClinicalTrials.gov/show/NCT01508845	Completed	Tufts University	2013-06-30
NCT01506557	Vitamin D Supplementation of Lactating Mothers	https://ClinicalTrials.gov/show/NCT01506557	Completed	Children’s Memorial Health Institute, Poland	2012-10-31
NCT01497132	Effects of Vitamin D on Beta Cell Function and Insulin Sensitivity in Pre-diabetes and Diabetes Mellitus Type 2	https://ClinicalTrials.gov/show/NCT01497132	Completed	Karolinska Institutet	2013-05-31
NCT01490333	Sunweavers: Supporting Native American Women’s Vitamin D Research	https://ClinicalTrials.gov/show/NCT01490333	Completed	University of Wisconsin, Madison	2014-01-31
NCT01488734	Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom	https://ClinicalTrials.gov/show/NCT01488734	Completed	Icahn School of Medicine at Mount Sinai	2013-09-30
NCT01480869	Study of Vitamin D Supplementation Tailored to Vitamin D Deficiency in Breast Cancer Patients	https://ClinicalTrials.gov/show/NCT01480869	Completed	Institut du Cancer de Montpellier - Val d’Aurelle	2014-12-31
NCT01477034	Vitamin D and Adipose Tissue Inflammation	https://ClinicalTrials.gov/show/NCT01477034	Completed	Fred Hutchinson Cancer Research Center	2013-06-30
NCT01443897	Effect of Consumption of Post-harvest UV-B Treated Mushrooms on Vitamin D Status of Healthy Adults	https://ClinicalTrials.gov/show/NCT01443897	Completed	USDA, Western Human Nutrition Research Center	2010-11-30
NCT01443728	Vitamin D for Sickle-cell Respiratory Complications	https://ClinicalTrials.gov/show/NCT01443728	Active, not recruiting	Columbia University	2013-06-20
NCT01437696	How Much Vitamin D is Required to be Protective Against Deficiency During the Winter Months?	https://ClinicalTrials.gov/show/NCT01437696	Completed	McGill University	2014-05-31
NCT01436916	Oral Cholecalciferol in Prevention of Type 2 Diabetes Mellitus	https://ClinicalTrials.gov/show/NCT01436916	Completed	Postgraduate Institute of Medical Education and Research	2012-09-30
NCT01430793	Determination of Effective Vitamin D Replacement and Monitoring Strategies in Vitamin D Deficiency State	https://ClinicalTrials.gov/show/NCT01430793	Completed	Aga Khan University	2013-03-31
NCT01426347	Treatment of Vitamin D Deficiency in Patients With Rheumatoid Arthritis	https://ClinicalTrials.gov/show/NCT01426347	Completed	Johns Hopkins University	2012-01-31
NCT01419119	Vitamin Deficiency in Immigrants, a Treatment Study	https://ClinicalTrials.gov/show/NCT01419119	Completed	Umeå University	2012-10-31
NCT01417351	Effects of Vitamin D Supplementation During Pregnancy on Clinical Outcomes and Immune Function	https://ClinicalTrials.gov/show/NCT01417351	Completed	USDA, Western Human Nutrition Research Center	2013-05-31
NCT01410084	Improving Vitamin D Status in Home-bound Elders	https://ClinicalTrials.gov/show/NCT01410084	Completed	Wake Forest University Health Sciences	2011-08-31
NCT01399151	Assessment of Vitamin D Supplementation and Immune Function	https://ClinicalTrials.gov/show/NCT01399151	Completed	USDA, Western Human Nutrition Research Center	2013-12-31
NCT01395589	Rapid vs Maintenance Vitamin D Supplementation in Deficient Children With Asthma to Prevent Exacerbations.	https://ClinicalTrials.gov/show/NCT01395589	Completed	Hamad Medical Corporation	2014-01-31
NCT01385098	Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients	https://ClinicalTrials.gov/show/NCT01385098	Completed	The Methodist Hospital System	2013-05-31
NCT01363167	Identifying Vitamin D Deficiency in Very Low Birth Weight Infant (VLBW) Infants Part 2	https://ClinicalTrials.gov/show/NCT01363167	Completed	Medical University of South Carolina	2013-10-31
NCT01354262	Effect of Vitamin D Supplementation on Hemoglobin A1c	https://ClinicalTrials.gov/show/NCT01354262	Completed	Ascension Genesys Hospital	2012-01-31
NCT01349127	Trial to Assess Vitamin D Requirements in Lactating Women	https://ClinicalTrials.gov/show/NCT01349127	Completed	University College Cork	2009-12-31
NCT01325987	African American Children, Glycemic Control, and Type 2 Diabetes	https://ClinicalTrials.gov/show/NCT01325987	Completed	University of Alabama at Birmingham	2012-12-31
NCT04407286	Vitamin D Testing and Treatment for COVID 19	https://ClinicalTrials.gov/show/NCT04407286	Recruiting	Arizona State University	2020-08-18
NCT04377399	High vs Low Dose Vitamin D in Patients With Diabetic Peripheral Neuropathy	https://ClinicalTrials.gov/show/NCT04377399	Completed	Federal State Budgetary Institution, V. A. Almazov Federal North-West Medical Research Centre, of the Ministry of Health	2019-06-20
NCT04359524	Vitamin D Supplementation in Conscripts	https://ClinicalTrials.gov/show/NCT04359524	Completed	Tartu University Hospital	2017-04-20
NCT04323852	Can Vitamin D Reduce Heart Muscle Damage After Bypass Surgery?	https://ClinicalTrials.gov/show/NCT04323852	Completed	Shahid Beheshti University of Medical Sciences	2018-12-01
NCT04319289	Effect of Aerobic Interval Training With Vitamin D Supplement on Functional Capacity and Perceived Myalgia	https://ClinicalTrials.gov/show/NCT04319289	Completed	Cairo University	2020-05-15
NCT04291833	Prospective, Assessment of Vitamin D and Calcium Supplementation, Improvement of Nutritional Status and Preoperative Rehabilitation in Patients Before Knee Arthroplasty.	https://ClinicalTrials.gov/show/NCT04291833	Completed	Jagiellonian University	2017-12-31
NCT04244474	Effect of Vitamin D Supplementation on Improvement of Pneumonic Children	https://ClinicalTrials.gov/show/NCT04244474	Active, not recruiting	Cairo University	2019-12-15
NCT04229368	Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications	https://ClinicalTrials.gov/show/NCT04229368	Recruiting	Brigham and Women’s Hospital	2021-07-01
NCT04207294	Vitamin D Enriched Meat Project (Acute Study)	https://ClinicalTrials.gov/show/NCT04207294	Recruiting	University of Ulster	2020-04-10
NCT04204304	Relationship Between Serum Vitamin D Levels and Musculoskeletal Adverse Effects in Patients Using Isotretinoin	https://ClinicalTrials.gov/show/NCT04204304	Completed	Ankara Training and Research Hospital	2019-08-15
NCT04183257	Effect of Escalating Oral Vitamin D Replacement on HOMA-IR in Vitamin D Deficient Type 2 Diabetics	https://ClinicalTrials.gov/show/NCT04183257	Completed	King Edward Medical University	2017-04-30
NCT04156074	Innovative Food Structures to Enhance Nutrient Bioavailability	https://ClinicalTrials.gov/show/NCT04156074	Recruiting	University College Dublin	2021-12-31
NCT04117581	A Study to Investigate the Effect of Vitamin D3 Supplementation on Asthma Symptoms in Adults With Asthma (VITDAS)	https://ClinicalTrials.gov/show/NCT04117581	Recruiting	University of Chester	2021-07-31
NCT04100226	Vitamin D Deficiency and Effect of Its Supplementation on Interstitial Lung Diseases(ILD).	https://ClinicalTrials.gov/show/NCT04100226	Active, not recruiting	Cairo University	2019-11-01
NCT04091178	Vitamin D Supplementation to Correct the Vitamin D Deficiency for Breast Cancer	https://ClinicalTrials.gov/show/NCT04091178	Completed	Institut du Cancer de Montpellier - Val d’Aurelle	2015-06-11
NCT04038853	Vitamin D in Fatty Liver Disease	https://ClinicalTrials.gov/show/NCT04038853	Completed	University Hospital Rijeka	2017-02-01
NCT04033796	Vitamin D Supplementation D_SAF Pilot Study	https://ClinicalTrials.gov/show/NCT04033796	Completed	University of Surrey	2016-06-10
NCT04010942	Vitamin D for Polycystic Ovary Syndrome Clomiphene Resistant Women	https://ClinicalTrials.gov/show/NCT04010942	Completed	Ain Shams University	2018-12-30
NCT04005573	The Combined Effect of Omega-3 Fatty Acid and Vitamin D3 on Lipid Profile Levels and Oxidized Low Density Lipoprotein	https://ClinicalTrials.gov/show/NCT04005573	Completed	Applied Science Private University	2019-11-01
NCT03991845	A Trial to Evaluate the Effect of Vitamin D Supplementation in Patients With Chronic Urticaria	https://ClinicalTrials.gov/show/NCT03991845	Enrolling by invitation	Postgraduate Institute of Medical Education and Research	2019-11-27
NCT03986268	Vitamin D Replacement Therapy Can Affects Pathological Response in Neoadjuvant Breast Cancer Treatment	https://ClinicalTrials.gov/show/NCT03986268	Recruiting	Florence Nightingale Hospital, Istanbul	2020-05-10
NCT03931889	Effects of Vitamin D3 Supplementation on Antioxidant Enzymes Status in Vitamin D3 Deficient Asthma COPD Overlap (ACO) Patients	https://ClinicalTrials.gov/show/NCT03931889	Active, not recruiting	Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh	2019-06-30
NCT03920150	Vitamin D 24’000 IU for Oral Intermittent Supplementation	https://ClinicalTrials.gov/show/NCT03920150	Completed	University Hospital, Basel, Switzerland	2020-05-31
NCT03919812	Immunomodulatory Vitamin D in Thalassemia	https://ClinicalTrials.gov/show/NCT03919812	Completed	Universitas Padjadjaran	2018-07-15
NCT03890458	The Effect of Vitamin D on Fertility	https://ClinicalTrials.gov/show/NCT03890458	Completed	Akdeniz University	2017-11-30
NCT03876704	Effects of Fat-soluble Vitamins Supplementation on Common Complications and Neural Development in Very Low Birth Weight Infants	https://ClinicalTrials.gov/show/NCT03876704	Recruiting	First Affiliated Hospital Xi’an Jiaotong University	2019-09-30
NCT03810261	Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2	https://ClinicalTrials.gov/show/NCT03810261	Active, not recruiting	Nutrition Institute, Slovenia	2020-10-31
NCT03792984	The Effect of Calcium and Vitamin D Supplements on Metabolic and Hormonal Disturbances in Polycystic Ovary Syndrome Patients	https://ClinicalTrials.gov/show/NCT03792984	Completed	Damascus University	2017-10-01
NCT03783273	The Influence of Food Matrix Delivery System on the Bioavailability of Vitamin D3	https://ClinicalTrials.gov/show/NCT03783273	Completed	University of Aarhus	2020-05-26
NCT03782805	Effect of Vitamin D Supplementation on Inflammatory Markers	https://ClinicalTrials.gov/show/NCT03782805	Completed	Université d’Auvergne	2018-06-07
NCT03773809	Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease(COPD) Overlap Patients	https://ClinicalTrials.gov/show/NCT03773809	Completed	Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh	2018-06-30
NCT03742505	Rapid Normalization of Vitamin D Deficiency in PICU	https://ClinicalTrials.gov/show/NCT03742505	Recruiting	Children’s Hospital of Eastern Ontario	2023-05-31
NCT03735303	Effect of Vitamin D3 and Omega-3FA on Leptin and HbA1C With Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT03735303	Completed	Applied Science Private University	2019-03-01
NCT03734744	PK/PD of Vitamin D3 in Adults With CF	https://ClinicalTrials.gov/show/NCT03734744	Recruiting	University of Southern California	2019-11-01
NCT03718182	Can Vitamin D Supplementation in People With Crohn’s Disease Improve Symptoms as an Adjunct Therapy?	https://ClinicalTrials.gov/show/NCT03718182	Recruiting	University Hospital Birmingham NHS Foundation Trust	2020-11-30
NCT03695562	Stability of Implants Placed in Patients With Vitamin D Deficiency Using Sequential Drilling vs a Single Drilling Design	https://ClinicalTrials.gov/show/NCT03695562	Active, not recruiting	Cairo University	2020-11-27
NCT03686150	Vitamin D Supplementation in Children With Obesity-Related Asthma	https://ClinicalTrials.gov/show/NCT03686150	Active, not recruiting	IDeA States Pediatric Clinical Trials Network	2021-01-31
NCT03649802	Vitamin D and Arterial Stiffness in Elderly	https://ClinicalTrials.gov/show/NCT03649802	Enrolling by invitation	Texas Tech University Health Sciences Center	2021-12-31
NCT03648528	Cholecalciferol Supplementation Effect on Parathyroid Hormone in Hemodialysis Patients	https://ClinicalTrials.gov/show/NCT03648528	Completed	Cooperativa Asistencia Sindicato Médico Uruguay	2018-05-31
NCT03644212	Vitamin D Increases Serum Levels of the Soluble Receptor for Advanced Glycation End Products in Women With PCOS	https://ClinicalTrials.gov/show/NCT03644212	Completed	Maimonides Medical Center	2013-09-30
NCT03613116	High-dose Vitamin D Supplements in Older Adults	https://ClinicalTrials.gov/show/NCT03613116	Recruiting	University of California, Davis	2022-03-30
NCT03602430	Cholecalciferol on Hemodialysis Patients	https://ClinicalTrials.gov/show/NCT03602430	Completed	Ain Shams University	2018-09-15
NCT03602261	Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI	https://ClinicalTrials.gov/show/NCT03602261	Recruiting	OPKO Health, Inc.	2020-12-31
NCT03588884	Repeated-dose Safety, Efficacy, PK and PD of CTAP101, IR Calcifediol, High-dose Cholecalciferol, and Paricalcitol Plus Low-dose Cholecalciferol in Patients With SHPT, CKD 3-4 and VDI	https://ClinicalTrials.gov/show/NCT03588884	Recruiting	OPKO Health, Inc.	2020-03-17
NCT03544671	Effect of Vitamin D3 Supplementation in Children From 12 to 30 Months of Age.	https://ClinicalTrials.gov/show/NCT03544671	Completed	Instituto Nacional de Salud Publica, Mexico	2017-06-18
NCT03536845	Vitamin D Supplementation to Prevent Vitamin D Deficiency for Children With Epilepsy	https://ClinicalTrials.gov/show/NCT03536845	Recruiting	King Saud University	2021-01-01
NCT03521492	Vitamin D Status With Early Childhood Caries	https://ClinicalTrials.gov/show/NCT03521492	Completed	Ministry of Health, Saudi Arabia	2018-02-20
NCT03504280	Changes in Serum Vitamin D Level After Different Loading Doses of Cholecalciferol	https://ClinicalTrials.gov/show/NCT03504280	Completed	Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh	2017-08-31
NCT03478475	Vitamin D Supplementation and and Glycemic Indexes	https://ClinicalTrials.gov/show/NCT03478475	Completed	Université d’Auvergne	2015-09-19
NCT03472833	High-dose Vitamin D3 in Pancreas Cancer	https://ClinicalTrials.gov/show/NCT03472833	Recruiting	Medical University of Graz	2020-05-31
NCT03463642	The Efficacy of Different Vitamin D Supplementation Delivery Methods	https://ClinicalTrials.gov/show/NCT03463642	Completed	University of Wolverhampton	2017-04-04
NCT03420378	Central Sensitization in Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT03420378	Completed	Marmara University	2018-12-19
NCT01268176	The Effect of a Meal on Vitamin D Absorption	https://ClinicalTrials.gov/show/NCT01268176	Completed	Tufts University	2012-06-30
NCT01268111	Effect of Vitamin D Replacement on Insulin Sensitivity	https://ClinicalTrials.gov/show/NCT01268111	Completed	Texas Tech University Health Sciences Center	2012-03-31
NCT01250899	Vitamin D in HIV-Infected Patients on HAART	https://ClinicalTrials.gov/show/NCT01250899	Completed	University of California, Los Angeles	2012-06-30
NCT01244204	Role of Vitamin D in Innate Immunity to Tuberculosis	https://ClinicalTrials.gov/show/NCT01244204	Completed	Harvard School of Public Health	2010-05-31
NCT01240512	DAYLIGHT: Vitamin D Therapy in Individuals at High Risk of Hypertension	https://ClinicalTrials.gov/show/NCT01240512	Completed	Massachusetts General Hospital	2013-10-31
NCT01240265	Vitamin D Supplementation in Breastfeeding Women	https://ClinicalTrials.gov/show/NCT01240265	Completed	Mayo Clinic	2011-08-31
NCT01240213	Vitamin D, Diet and Activity Study	https://ClinicalTrials.gov/show/NCT01240213	Completed	Fred Hutchinson Cancer Research Center	2012-08-31
NCT01229878	Vitamin D Supplementation in Kidney Disease	https://ClinicalTrials.gov/show/NCT01229878	Recruiting	VA Office of Research and Development	2021-01-01
NCT01229189	Evaluation of the Effectiveness of Vitamin D Supplementation to Pregnant Women and Their Infants in Pakistan.	https://ClinicalTrials.gov/show/NCT01229189	Completed	Aga Khan University	2011-08-31
NCT01214928	Hemodialysis Vitamin D Pilot	https://ClinicalTrials.gov/show/NCT01214928	Completed	St. Joseph’s Healthcare Hamilton	2011-05-31
NCT01190683	Vitamin D and Muscle Strength and Surface (Electromyography) EMG	https://ClinicalTrials.gov/show/NCT01190683	Completed	Indian Council of Medical Research	2011-04-30
NCT01187459	Vitamin D in Pediatric Crohn’s Disease	https://ClinicalTrials.gov/show/NCT01187459	Completed	University of British Columbia	2012-02-29
NCT01180946	Vitamin D Deficiency in Adolescent Girls	https://ClinicalTrials.gov/show/NCT01180946	Completed	Massachusetts General Hospital	2013-04-30
NCT01175798	Impact of Vitamin D Repletion in Hemodialysis Patients	https://ClinicalTrials.gov/show/NCT01175798	Completed	Mehrotra, Anita, M.D.	2013-08-31
NCT02022475	Effect of Vitamin D Treatment on Fatigue	https://ClinicalTrials.gov/show/NCT02022475	Completed	University of Zurich	2015-05-31
NCT01170494	Effect of Vitamin D Oral Supplements on 25 OH Vitamin D Levels	https://ClinicalTrials.gov/show/NCT01170494	Completed	King Faisal Specialist Hospital & Research Center	2016-04-30
NCT01170273	Vitamin D in Vulnerable Adults (VIVA-VA)	https://ClinicalTrials.gov/show/NCT01170273	Completed	VA Office of Research and Development	2014-06-30
NCT01168544	Daily Vitamin D Supplementation Compared to a Loading Dose and Monthly Supplementation in Elderly Nursing Home Residents	https://ClinicalTrials.gov/show/NCT01168544	Completed	Rijnstate Hospital	NA
NCT01166165	Effect of Vitamin D Replacement During Winter Months in Patients With Hypertension	https://ClinicalTrials.gov/show/NCT01166165	Completed	Regional Hospital Holstebro	2011-04-30
NCT01141972	The Role of Vitamin D in Menopause: Relationship to Menopausal Symptoms in Body Composition	https://ClinicalTrials.gov/show/NCT01141972	Completed	Kaiser Permanente	2012-02-29
NCT01130181	VITdAL@ICU - Correction of Vitamin D Deficiency in Critically Ill Patients	https://ClinicalTrials.gov/show/NCT01130181	Completed	Medical University of Graz	2012-09-30
NCT01119378	Study to Observe the Capability to Absorb Calcium as an Measure of Adequate Levels of Vitamin D	https://ClinicalTrials.gov/show/NCT01119378	Completed	Winthrop University Hospital	2013-12-31
NCT01112891	Vitamin D in Pregnancy and Lactation	https://ClinicalTrials.gov/show/NCT01112891	Completed	University of British Columbia	2012-08-31
NCT01093417	Study of Vitamin D and Effect on Heart Disease and Insulin Resistance	https://ClinicalTrials.gov/show/NCT01093417	Completed	University Hospitals Cleveland Medical Center	2010-10-31
NCT01090206	Correlation Between Vitamin D Status and Bone Mineral Density in Patients With Hemophilia	https://ClinicalTrials.gov/show/NCT01090206	Completed	Virginia Commonwealth University	2013-03-31
NCT01068418	Vitamin D Supplementation Reduces Renin-Angiotensin System Activity in Obesity	https://ClinicalTrials.gov/show/NCT01068418	Completed	Brigham and Women’s Hospital	2011-09-30
NCT01067898	A Study on Oral Vitamin D Megadoses	https://ClinicalTrials.gov/show/NCT01067898	Completed	Helsinki University Central Hospital	2011-05-31
NCT01058720	Efficacy of Daily Vitamin D3 Supplementation in Normal Weight Adolescents	https://ClinicalTrials.gov/show/NCT01058720	Completed	Mayo Clinic	2011-01-31
NCT01050387	Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children	https://ClinicalTrials.gov/show/NCT01050387	Completed	Yale University	2013-02-28
NCT01049048	The Effect of Vitamin D Statues on Endothelial Function	https://ClinicalTrials.gov/show/NCT01049048	Completed	University of Wisconsin, Madison	2010-10-31
NCT01029392	Prevalence of Vitamin D Deficiency in Type 1 Diabetes Mellitus and Effect of Supplementation on Insulin Requirements	https://ClinicalTrials.gov/show/NCT01029392	Completed	William Beaumont Hospitals	2012-06-30
NCT01025128	Vitamin D Status in Males in Jerusalem Area and Its Correlation to Parathyroid Hormone (PTH) Level and Bone Mineral Density	https://ClinicalTrials.gov/show/NCT01025128	Completed	Clalit Health Services	2014-07-31
NCT01024777	Safety and Immunologic Effect of Low Dose Versus High Dose Vitamin D3 in Multiple Sclerosis	https://ClinicalTrials.gov/show/NCT01024777	Completed	Johns Hopkins University	2013-01-31
NCT01023490	Vitamin D Treatment to Patients Suffering From Chronic Pain and Vitamin D Hypovitaminosis	https://ClinicalTrials.gov/show/NCT01023490	Completed	Tel-Aviv Sourasky Medical Center	2012-10-31
NCT01016184	Influence of Vitamin D Treatment on Multi-systemic Functions in Young Men With Vitamin D Deficiency Due to Work Conditions	https://ClinicalTrials.gov/show/NCT01016184	Completed	Rambam Health Care Campus	2012-03-31
NCT01013584	The Effect of Weight on Vitamin D Dose Response	https://ClinicalTrials.gov/show/NCT01013584	Completed	Creighton University	2011-06-30
NCT01004354	Vitamin D Supplementation in Psychiatric Illnesses	https://ClinicalTrials.gov/show/NCT01004354	Completed	University of Massachusetts, Worcester	2010-06-30
NCT00996866	Vitamin D Supplementation Requirement in Obese Subjects	https://ClinicalTrials.gov/show/NCT00996866	Completed	Winthrop University Hospital	2011-06-30
NCT00968877	Vitamin D and Chronic Renal Insufficiency	https://ClinicalTrials.gov/show/NCT00968877	Completed	Odense University Hospital	2009-12-31
NCT00968734	Vitamin D Status After Single Oral Dose of Cholecalciferol in Low Fat Meal Compared to High-fat Meal	https://ClinicalTrials.gov/show/NCT00968734	Completed	Federal University of Rio Grande do Sul	2009-10-31
NCT00960232	Vitamin D, Blood Pressure, Lipids, Infection and Depression	https://ClinicalTrials.gov/show/NCT00960232	Completed	University of Tromso	2010-12-31
NCT00958451	Vitamin D Deficiency in Chronic Kidney Disease (CKD) Patients	https://ClinicalTrials.gov/show/NCT00958451	Completed	Salem Veterans Affairs Medical Center	2011-01-31
NCT00957879	Different Vitamin D Preparations & FGF23 in Humans	https://ClinicalTrials.gov/show/NCT00957879	Completed	Massachusetts General Hospital	2010-09-30
NCT00948298	Effect of Vitamin D3 on Vascular Function	https://ClinicalTrials.gov/show/NCT00948298	Completed	Charles Drew University of Medicine and Science	2011-07-31
NCT00933244	Treatment of Vitamin D Insufficiency	https://ClinicalTrials.gov/show/NCT00933244	Completed	University of Wisconsin, Madison	2014-08-31
NCT00921622	Vitamin Deficiency and Blood Pressure in Hospitalized Jewish General Hospital (JGH) Patients	https://ClinicalTrials.gov/show/NCT00921622	Completed	Jewish General Hospital	2009-10-31
NCT00909454	Vitamin D Supplement Study for Adolescents	https://ClinicalTrials.gov/show/NCT00909454	Completed	Augusta University	2009-03-31
NCT00893451	Study of Vitamin D3 Supplementation in Patients With Chronic Kidney Disease	https://ClinicalTrials.gov/show/NCT00893451	Completed	Sahlgrenska University Hospital, Sweden	2011-06-30
NCT00886379	Blue Sky Study: Impact of Milk and Vitamin D for Child Growth and Health	https://ClinicalTrials.gov/show/NCT00886379	Completed	Brigham and Women’s Hospital	2009-03-31
NCT00882505	Comparison of 25-hydroxy Vitamin D Level in Caucasian Women Receiving Vitamin D Supplementation and Not Receiving Supplementation: a Randomized Controlled Trial.	https://ClinicalTrials.gov/show/NCT00882505	Completed	Northwestern University	2010-08-31
NCT00882401	Vitamin D, Chronic Kidney Disease (CKD) and the Microcirculation	https://ClinicalTrials.gov/show/NCT00882401	Completed	Barts & The London NHS Trust	2010-10-31
NCT03233295	A Prospective, Single-centre, Open-label Study to Confirm the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT03233295	Completed	Kwang Dong Pharmaceutical co., ltd.	2016-08-27
NCT01037140	Effects of Vitamin D Supplementation in Obesity	https://ClinicalTrials.gov/show/NCT01037140	Completed	University of Aarhus	2011-12-31
NCT03813927	Vitamin D Treatment of Diabetic Patients With Foot Ulcers	https://ClinicalTrials.gov/show/NCT03813927	Completed	Zealand University Hospital	2017-12-31
NCT01503216	Safety and Bioefficacy of Vitamin D2 and Vitamin D3	https://ClinicalTrials.gov/show/NCT01503216	Completed	Martin-Luther-Universität Halle-Wittenberg	2012-05-31
NCT01465178	Improving the Understanding of the Response to Vitamin D Supplementation	https://ClinicalTrials.gov/show/NCT01465178	Completed	University of Wisconsin, Madison	2014-12-31
NCT04005612	Effect of Vitamin d and Omega 3 on Osteocalcin	https://ClinicalTrials.gov/show/NCT04005612	Active, not recruiting	Applied Science Private University	2020-02-01
NCT03405207	Vitamin D Deficiency Treatment Outcomes After Non-ST-Segment Elevation Myocardial Infarction	https://ClinicalTrials.gov/show/NCT03405207	Recruiting	Isfahan University of Medical Sciences	2018-10-01
NCT03264625	The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis	https://ClinicalTrials.gov/show/NCT03264625	Recruiting	Peking University First Hospital	2020-09-30
NCT02158598	Comparison of Changes in Serum 25(OH)D Concentrations Following Vitamin D Supplementation With Chewable Tablets Versus Pills	https://ClinicalTrials.gov/show/NCT02158598	Completed	CHU de Quebec-Universite Laval	2017-12-31
NCT01512537	Alternative Treatments of Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT01512537	Completed	Lund University	2011-04-30
NCT03609970	Vitamin D and Immunity: Photosynthesis Versus Supplementation	https://ClinicalTrials.gov/show/NCT03609970	Completed	Guy’s and St Thomas’ NHS Foundation Trust	2017-04-14
NCT03490448	The Changes of Body Composition, Glucolipid Metabolism and Bone Metabolism in Obese Children After Weight Loss	https://ClinicalTrials.gov/show/NCT03490448	Completed	Xinhua Hospital, Shanghai Jiao Tong University School of Medicine	2014-08-16
NCT03437421	Myocardial Function and Vitamin D Supplementation in Diabetes.	https://ClinicalTrials.gov/show/NCT03437421	Recruiting	University of Avignon	2020-12-31
NCT00789503	Nursing-Home Residents Given Bread Fortified With Vitamin D3	https://ClinicalTrials.gov/show/NCT00789503	Completed	University of Toronto	2005-12-31
NCT00752102	Vitamin D and Coronary Calcification Study	https://ClinicalTrials.gov/show/NCT00752102	Completed	Joslin Diabetes Center	2013-10-31
NCT00749918	Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism	https://ClinicalTrials.gov/show/NCT00749918	Completed	University of Minnesota	2008-06-30
NCT00743574	Health Benefits of Vitamin D and Calcium in Women With PCOS (Polycystic Ovarian Syndrome)	https://ClinicalTrials.gov/show/NCT00743574	Completed	Yale University	2013-02-28
NCT00742235	hCAP18 Levels and Vitamin D Deficiency in Healthy Subjects	https://ClinicalTrials.gov/show/NCT00742235	Completed	Massachusetts General Hospital	2012-01-31
NCT00736632	Vitamin D, Insulin Resistance, and Cardiovascular Disease	https://ClinicalTrials.gov/show/NCT00736632	Completed	Washington University School of Medicine	2019-01-13
NCT00723385	Effects of Vitamin D on Lipids	https://ClinicalTrials.gov/show/NCT00723385	Completed	University of California, San Francisco	2012-07-31
NCT00697294	Impact of Vitamin D Status on Bones in Breastfed Infants	https://ClinicalTrials.gov/show/NCT00697294	Completed	Baylor College of Medicine	2011-07-31
NCT00692120	Clinical Approaches to Correcting Vitamin D Inadequacy and Maintaining Adequacy	https://ClinicalTrials.gov/show/NCT00692120	Completed	University of Wisconsin, Madison	2008-11-30
NCT00690417	Vitamin D Inadequacy in Rural Populations, Evaluation of Correction by Food Supplementation	https://ClinicalTrials.gov/show/NCT00690417	Completed	University of Wisconsin, Madison	2011-08-31
NCT00685971	Cholecalciferol for Vitamin D in Adult Cystic Fibrosis (CF) Patients	https://ClinicalTrials.gov/show/NCT00685971	Completed	St. Michael’s Hospital, Toronto	2013-07-31
NCT00682214	Cholecalciferol Supplementation, Muscle Strength	https://ClinicalTrials.gov/show/NCT00682214	Completed	Indian Council of Medical Research	2008-11-30
NCT00674154	Effect of Vitamin D Treatment in Primary Hyperparathyroidism	https://ClinicalTrials.gov/show/NCT00674154	Completed	University of Aarhus	2013-08-31
NCT00662844	Vitamin D Supplementation in Younger Women	https://ClinicalTrials.gov/show/NCT00662844	Completed	Creighton University	2011-08-31
NCT00610688	Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants	https://ClinicalTrials.gov/show/NCT00610688	Completed	Children’s Hospital Medical Center, Cincinnati	2011-06-30
NCT00581828	Does Treatment of Hypovitaminosis D Increase Calcium Absorption?	https://ClinicalTrials.gov/show/NCT00581828	Completed	University of Wisconsin, Madison	2008-07-31
NCT00497900	The Effect of Calcium and Vitamin D in Patients With Heart Failure	https://ClinicalTrials.gov/show/NCT00497900	Completed	Hvidovre University Hospital	2011-09-30
NCT00494104	Prevention of Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT00494104	Completed	Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)	2011-09-30
NCT00491322	Vitamin D Deficiency, Insulin Resistance and FGF-23	https://ClinicalTrials.gov/show/NCT00491322	Completed	Massachusetts General Hospital	2008-02-29
NCT00473317	Sunlight Exposures Effect on Serum Vitamin D Levels	https://ClinicalTrials.gov/show/NCT00473317	Completed	Creighton University	2007-09-30
NCT00473239	The Pharmacokinetics of a Single Large Dose of Vitamin D3	https://ClinicalTrials.gov/show/NCT00473239	Completed	Creighton University	2007-03-31
NCT00427037	Cholecalciferol (Vitamin D3) Therapy in Chronic Kidney Disease (CKD) Subjects	https://ClinicalTrials.gov/show/NCT00427037	Completed	Atlanta VA Medical Center	2006-07-31
NCT00423358	Treatment of Hypovitaminosis D in Rheumatoid Arthritis	https://ClinicalTrials.gov/show/NCT00423358	Completed	University of Wisconsin, Madison	2008-08-31
NCT00416715	Vitamin D Deficiency, Muscle Pain, Joint Pain, and Joint Stiffness in Postmenopausal Women Receiving Letrozole For Stage I-III Breast Cancer	https://ClinicalTrials.gov/show/NCT00416715	Completed	University of Washington	2010-05-31
NCT00415402	Effect of Vitamin D Supplementation on Health of Low Birth Weight Infants	https://ClinicalTrials.gov/show/NCT00415402	Completed	Delhi University	2010-07-31
NCT00412087	Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina	https://ClinicalTrials.gov/show/NCT00412087	Completed	Medical University of South Carolina	2009-07-31
NCT00412074	Establishing the Vitamin D Requirements During Lactation	https://ClinicalTrials.gov/show/NCT00412074	Completed	Medical University of South Carolina	2012-10-31
NCT00381914	Vitamin D Dose-Response Study to Establish Dietary Requirements in Infants	https://ClinicalTrials.gov/show/NCT00381914	Completed	McGill University	2011-09-30
NCT00327847	Optimizing Vitamin D Nutrition in Healthy Adults	https://ClinicalTrials.gov/show/NCT00327847	Completed	Winthrop University Hospital	2006-12-31
NCT00292591	Evaluation of Vitamin D Requirements During Pregnancy	https://ClinicalTrials.gov/show/NCT00292591	Completed	Medical University of South Carolina	2010-01-31
NCT00288873	Characterization of Hyperparathyroidism and Vitamin D Deficiency in Obesity	https://ClinicalTrials.gov/show/NCT00288873	Completed	Weill Medical College of Cornell University	2007-07-31
NCT00273611	Vitamin D Levels and Vitamin D Education in Geriatric Patients	https://ClinicalTrials.gov/show/NCT00273611	Completed	University of Colorado, Denver	2006-05-31
NCT00267540	The Effect of Vitamin D on Bone Accretion and Turn-Over in Young Girls	https://ClinicalTrials.gov/show/NCT00267540	Completed	University of Copenhagen	NA
NCT00242476	A Study to Assess the Effectiveness of an Investigational Drug in Elderly Subjects With Low Vitamin D Levels (0822A-009)	https://ClinicalTrials.gov/show/NCT00242476	Completed	Merck Sharp & Dohme Corp.	2006-07-31
NCT00235586	Vitamin D Deficiency: Bone Loss and Vascular Dysfunction	https://ClinicalTrials.gov/show/NCT00235586	Completed	University of Kansas Medical Center	NA
NCT00204919	Vitamin D Administration in the Nursing Home	https://ClinicalTrials.gov/show/NCT00204919	Completed	University of Wisconsin, Madison	2004-05-31
NCT00204906	Correction of Vitamin D Inadequacy in Nursing Home Residents	https://ClinicalTrials.gov/show/NCT00204906	Completed	University of Wisconsin, Madison	2009-01-31
NCT00092079	A Study of MK0217A and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227)	https://ClinicalTrials.gov/show/NCT00092079	Completed	Merck Sharp & Dohme Corp.	2004-11-30
NCT00092066	A Study to Evaluate the Safety, Tolerability, and Efficacy of an Investigational Drug and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227)	https://ClinicalTrials.gov/show/NCT00092066	Completed	Merck Sharp & Dohme Corp.	2004-05-01
NCT00681590	Safety of Vitamin D Supplementation in Older Persons	https://ClinicalTrials.gov/show/NCT00681590	Completed	University of Miami	2009-04-30

Observational Studiess

#If less then 500 studies

nct_id	brief_title	link	overall_status	source	primary_completion_date
NCT03381378	Vitamin D and Hand Grip Strength at 5 Years in Odense Child Cohort	https://ClinicalTrials.gov/show/NCT03381378	Completed	Odense University Hospital	2017-06-30
NCT03376490	Study of the Association of Muscle Strength, Balance and Other Factors With Vitamin Levels Among Elderly Diabetics	https://ClinicalTrials.gov/show/NCT03376490	Completed	SingHealth Polyclinics	2014-08-31
NCT03820895	Vitamin D Levels in Adolescent Idiopathic Scoliosis	https://ClinicalTrials.gov/show/NCT03820895	Completed	Security Forces Hospital	2018-08-20
NCT03305510	Vitamin D Deficiency of Couples and Infertility	https://ClinicalTrials.gov/show/NCT03305510	Completed	Tongji Hospital	2017-03-01
NCT03304795	Vitamin D Deficiency Still Growing	https://ClinicalTrials.gov/show/NCT03304795	Completed	DongGuk University	2014-12-31
NCT03284840	Adults Nutrition as a Protective or Health-risk Factor	https://ClinicalTrials.gov/show/NCT03284840	Active, not recruiting	Nutrition Institute, Slovenia	2018-09-13
NCT03273725	Maternal Vitamin D Levels in Pregnancy and Dental Caries in Children	https://ClinicalTrials.gov/show/NCT03273725	Completed	Tannhelsetjenestens Kompetansesenter Midt-Norge	2017-08-31
NCT03234218	Vitamin D Levels in Liver Transplantation Recipients Prospective Observational Study	https://ClinicalTrials.gov/show/NCT03234218	Completed	The Mediterranean Institute for Transplantation and Advanced Specialized Therapies	2017-09-30
NCT03221972	Vitamin D of Chinese Children and Adolescents	https://ClinicalTrials.gov/show/NCT03221972	Completed	Centers for Disease Control and Prevention, China	2013-12-30
NCT03203382	Corneal Nerve Structure in Sjogren’s	https://ClinicalTrials.gov/show/NCT03203382	Completed	University of Pennsylvania	2017-04-30
NCT03073720	Follicular Fluid, Bioavailable Vitamin D and Embryo Quality Markers	https://ClinicalTrials.gov/show/NCT03073720	Completed	IVI Middle East Fertility Clinic	2019-07-30
NCT03021629	Comparison of Vitamin D Status and Vitamin D Receptor Polymorphisms in Patients With High Myopia and Primary Open-angle Glaucoma	https://ClinicalTrials.gov/show/NCT03021629	Completed	Tianjin Medical University Eye Hospital	2016-12-31
NCT02906319	Vitamin D and HbA1c Levels in Diabetic Patients With CKD	https://ClinicalTrials.gov/show/NCT02906319	Completed	University of Malaya	2016-07-31
NCT02904720	Prevalence and Consequences of Vitamin D Deficiency in Pregnant Women in Switzerland	https://ClinicalTrials.gov/show/NCT02904720	Completed	University Hospital Inselspital, Berne	2016-02-29
NCT02539745	Associations of Vitamin D Deficiency and Vitamin D Receptor Polymorphisms With the Risk of Primary Open-angle Glaucoma	https://ClinicalTrials.gov/show/NCT02539745	Completed	Tianjin Medical University Eye Hospital	2014-12-31
NCT02534714	Analysis of Hypovitaminosis D and Osteopenia/Osteoporosis in Spinal Disease Patients Who Underwent a Spinal Fusion at Illinois Neurological Institute, Peoria, IL., a Retrospective Review From November 1, 2012 to October 31, 2014 and Prospective Pilot From July 1, 2015-June 30, 2016	https://ClinicalTrials.gov/show/NCT02534714	Completed	OSF Healthcare System	2017-06-30
NCT02438488	Vitamin D and Mortality: an Individual Participant Data Meta-analysis of Standardized 25-hydroxyvitamin D	https://ClinicalTrials.gov/show/NCT02438488	Completed	Medical University of Graz	2015-09-30
NCT02416895	Vitamin D Status and Immune Function	https://ClinicalTrials.gov/show/NCT02416895	Completed	Bangor University	2015-12-31
NCT02301520	Vitamin D, Iodine, and Lead Levels in Haitian Infants and Children.	https://ClinicalTrials.gov/show/NCT02301520	Completed	Boston Children’s Hospital	2015-06-30
NCT02295228	Hip Arthroplasty and Vitamin D Status	https://ClinicalTrials.gov/show/NCT02295228	Completed	University of Wisconsin, Madison	2015-11-30
NCT02281162	The Influence of Vitamin D on Atypical Antipsychotic-induced Weight Gain	https://ClinicalTrials.gov/show/NCT02281162	Completed	Creighton University	2015-09-30
NCT02258035	Isolation of Vitamin D Binding Protein Isoforms From Human Volunteers	https://ClinicalTrials.gov/show/NCT02258035	Active, not recruiting	Universitaire Ziekenhuizen Leuven	2016-12-31
NCT02250625	Study Vitamin D in Healthy Individuals	https://ClinicalTrials.gov/show/NCT02250625	Completed	Fujirebio Diagnostics, Inc.	2015-04-30
NCT02190396	Vitamin D Deficiency and Placental Calcification in Low-risk Obstetric Population - Are They Related?	https://ClinicalTrials.gov/show/NCT02190396	Completed	Zekai Tahir Burak Women’s Health Research and Education Hospital	2014-05-31
NCT02187146	The Effects of Serum Vitamin D and IVF Outcome	https://ClinicalTrials.gov/show/NCT02187146	Completed	University of Birmingham	2014-12-31
NCT01999608	Vitamin D Deficiency and Ovarian Reserve Among Infertile Patients	https://ClinicalTrials.gov/show/NCT01999608	Completed	Universitair Ziekenhuis Brussel	2014-06-30
NCT01985672	Vitamin D Deficiency and Pregnancy Rates in Women Undergoing Frozen Embryo Transfer	https://ClinicalTrials.gov/show/NCT01985672	Completed	Universitair Ziekenhuis Brussel	2014-06-30
NCT01971411	Vitamin D Deficiency in Elderly African American Women in Central Texas	https://ClinicalTrials.gov/show/NCT01971411	Completed	McLennan County Medical Education and Research Foundation	2007-05-31
NCT01926808	Vitamin D Serum Concentrations & Supplementation in Children With Cerebral Palsy	https://ClinicalTrials.gov/show/NCT01926808	Completed	Akron Children’s Hospital	2015-12-31
NCT01817231	Epidemiological Analysis of Vitamin D and Breast Cancer Risk in Saudi Arabian Women	https://ClinicalTrials.gov/show/NCT01817231	Completed	University of Arizona	2009-08-31
NCT01816711	Vitamin D Levels in Frail Elderly Patients With a Hip Fracture	https://ClinicalTrials.gov/show/NCT01816711	Completed	University of Aarhus	2012-09-30
NCT01793181	Vitamin D Levels in Patients With Central Retinal Vein Occlusion- a Prospective Controlled Study	https://ClinicalTrials.gov/show/NCT01793181	Completed	St. Erik Eye Hospital	2014-08-31
NCT01705522	Multimodal Approach in IBD Patients	https://ClinicalTrials.gov/show/NCT01705522	Recruiting	Clinical Hospital Colentina	2019-09-30
NCT01696409	The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression	https://ClinicalTrials.gov/show/NCT01696409	Completed	Boston University	2012-06-30
NCT03349879	Familial Clustering of Vitamin D Deficiency Via Shared Environment: The Korean National Health And Nutrition Examination Survey 2008-2012	https://ClinicalTrials.gov/show/NCT03349879	Completed	Yonsei University	2012-12-31
NCT01634607	Bone Health and Vitamin D Status	https://ClinicalTrials.gov/show/NCT01634607	Enrolling by invitation	Thai Red Cross AIDS Research Centre	2020-10-31
NCT01589783	Vitamin D During Pregnancy	https://ClinicalTrials.gov/show/NCT01589783	Completed	Hadassah Medical Organization	2014-06-30
NCT01553344	Serum Sclerostin Level & Treatment of Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT01553344	Completed	Bagcilar Training and Research Hospital	2013-04-30
NCT01548716	A Study of 25-hydroxy Vitamin d Levels in Non-itching Hemodialysis Patients	https://ClinicalTrials.gov/show/NCT01548716	Completed	Winthrop University Hospital	2011-10-31
NCT02024490	The Effect of Maternal and Neonatal Vitamin D Levels on Respiratory Distress Syndrome in Preterm Infants	https://ClinicalTrials.gov/show/NCT02024490	Completed	Kanuni Sultan Suleyman Training and Research Hospital	2013-12-31
NCT01432678	Vitamin D Status in Pediatric Asthma	https://ClinicalTrials.gov/show/NCT01432678	Completed	Mahidol University	2013-06-30
NCT01420315	The Prevalence of Vitamin D Deficiency in Patients With Alzheimer’s Disease	https://ClinicalTrials.gov/show/NCT01420315	Completed	Saglik Bilimleri Universitesi Gulhane Tip Fakultesi	2012-08-31
NCT01413230	Vitamin D Supplementation in Systemic Lupus Erythematosus	https://ClinicalTrials.gov/show/NCT01413230	Completed	Assistance Publique - Hôpitaux de Paris	2011-01-31
NCT01410305	Vitamin D and HIV-Cardiovascular Disease in Children and Young Adults	https://ClinicalTrials.gov/show/NCT01410305	Completed	University Hospitals Cleveland Medical Center	2014-12-31
NCT01397383	Vitamin D and Functional Outcomes After Total Hip Arthroplasty (THA)	https://ClinicalTrials.gov/show/NCT01397383	Completed	Hospital for Special Surgery, New York	2011-06-30
NCT01328704	Evaluate the Change in Iron, Vitamin D, and C-Reactive Protein Level (CRP) in a 12 to 24 Week Period	https://ClinicalTrials.gov/show/NCT01328704	Completed	Avera McKennan Hospital & University Health Center	2013-03-31
NCT04407572	Evaluation of the Relationship Between Zinc Vitamin D and b12 Levels in the Covid-19 Positive Pregnant Women	https://ClinicalTrials.gov/show/NCT04407572	Completed	Kanuni Sultan Suleyman Training and Research Hospital	2020-06-01
NCT04404842	Development of a Screening Tool for the Risk of Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT04404842	Recruiting	University of Pavia	2022-01-31
NCT04403932	Increased Risk of Severe Coronavirus Disease 2019 in Patients With Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT04403932	Recruiting	Hospital San Carlos, Madrid	2020-06-01
NCT04389424	Relationship Between Body Composition, Food Consumption, and Micro and Macronutrients With Gene Expression in Breast Cancer	https://ClinicalTrials.gov/show/NCT04389424	Recruiting	Instituto Jalisciense de Cancerologia	2020-05-15
NCT04324853	Helminth Infection During Pregnancy on Vitamin D Regulation: HELMVIT Study	https://ClinicalTrials.gov/show/NCT04324853	Recruiting	Centre de Recherche Médicale de Lambaréné	2020-12-31
NCT04209231	Effect of Vitamin D on Periodontal Disease	https://ClinicalTrials.gov/show/NCT04209231	Completed	Recep Tayyip Erdogan University Training and Research Hospital	2016-04-30
NCT04066842	Vitamin D in Systemic Sclerosis Patients With Periodontitis	https://ClinicalTrials.gov/show/NCT04066842	Completed	University of Messina	2019-05-15
NCT04030182	Vitamin D Deficit in Women With Uterine Fibroids	https://ClinicalTrials.gov/show/NCT04030182	Recruiting	Instituto Mexicano del Seguro Social	2020-10-30
NCT03991078	Effect of Vitamin D on the Size of Fibroids in Women With Vitamin D Deficiency	https://ClinicalTrials.gov/show/NCT03991078	Recruiting	Fundación IVI	2020-06-25
NCT03894735	Vitamin D in Ectopic Pregnancies	https://ClinicalTrials.gov/show/NCT03894735	Completed	Kanuni Sultan Suleyman Training and Research Hospital	2017-06-01
NCT03882099	Vitamin D Level and Its Relation to Pre-eclampsia and Eclampsia	https://ClinicalTrials.gov/show/NCT03882099	Recruiting	Cairo University	2019-09-17
NCT03873935	Vitamin D in Periodontal and Cardiovascular Disease Progression	https://ClinicalTrials.gov/show/NCT03873935	Completed	University of Messina	2018-01-05
NCT03829943	Vitamin D and Human Sperm DNA Fragmentation	https://ClinicalTrials.gov/show/NCT03829943	Recruiting	Sanford Health	2020-02-29
NCT03683238	Nutritional Status and Hidradenitis Suppurativa (Acne Inversa)	https://ClinicalTrials.gov/show/NCT03683238	Completed	Federico II University	2018-04-30
NCT03665974	The Relation Between Vitamin D and Gestational Diabetes Mellitus	https://ClinicalTrials.gov/show/NCT03665974	Completed	Hacettepe University	2013-08-05
NCT03639584	Prevalence of Deficiency of Vitamin D in Critically Ill Patients	https://ClinicalTrials.gov/show/NCT03639584	Recruiting	National Taiwan University Hospital	2020-10-31
NCT03638037	Correlation Between Maternal Vitamin D Level And Preterm Birth	https://ClinicalTrials.gov/show/NCT03638037	Recruiting	Ain Shams Maternity Hospital	2019-03-31
NCT03584256	Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time	https://ClinicalTrials.gov/show/NCT03584256	Completed	University of Ljubljana	2018-04-06
NCT03471481	Magnesium as a Mediator of Bone and Vitamin D Metabolism in Patients on Antiepileptic Drug Therapy	https://ClinicalTrials.gov/show/NCT03471481	Recruiting	Drexel University	2020-08-10
NCT01208636	Environmental & Genetic Influences on Vitamin D Status	https://ClinicalTrials.gov/show/NCT01208636	Completed	Creighton University	2010-08-31
NCT03871868	Vitamin D Levels And Myoma Uteri	https://ClinicalTrials.gov/show/NCT03871868	Completed	Kanuni Sultan Suleyman Training and Research Hospital	2019-03-01
NCT01118806	Vitamin D Levels in Residents in Medicine	https://ClinicalTrials.gov/show/NCT01118806	Completed	Meir Medical Center	2011-11-30
NCT01105689	Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers	https://ClinicalTrials.gov/show/NCT01105689	Completed	Nemours Children’s Clinic	2011-07-31
NCT00887666	Pilot Study: Hypovitaminosis D, Hyperparathyroidism and Hypomagnesemia in Patients With Congestive Heart Failure	https://ClinicalTrials.gov/show/NCT00887666	Completed	State University of New York - Downstate Medical Center	2008-10-31
NCT00851396	Assessment of Influence of Vitamin D on Insulin Secretion and Sensitivity in Obese Teenage Girls	https://ClinicalTrials.gov/show/NCT00851396	Completed	University of Alabama at Birmingham	2010-10-31
NCT00850694	Vitamin D Deficiency in Obese Adolescent Girls and Influence of Vitamin D on Insulin Secretion and Sensitivity	https://ClinicalTrials.gov/show/NCT00850694	Completed	University of Alabama at Birmingham	2010-10-31
NCT03483584	Incidence of HANA Conditions in HIV-infected Individuals	https://ClinicalTrials.gov/show/NCT03483584	Recruiting	Chinese University of Hong Kong	2022-01-31
NCT03253055	The D-BIICEP Study	https://ClinicalTrials.gov/show/NCT03253055	Completed	University of Surrey	2018-07-01
NCT01793402	Vitamin D Status and the Adequacy of Vitamin D Intake in Early Preterm Infants	https://ClinicalTrials.gov/show/NCT01793402	Completed	Children’s Hospital Medical Center, Cincinnati	2012-05-31
NCT00780247	Environmental Influences on Vitamin D Status	https://ClinicalTrials.gov/show/NCT00780247	Completed	Creighton University	2008-08-31
NCT00756899	Vitamin D Deficiency and Low Bone Mineral Content in Children	https://ClinicalTrials.gov/show/NCT00756899	Completed	University of Massachusetts, Worcester	2012-05-31
NCT00749541	Vitamin d Levels and Coronary Catheterization	https://ClinicalTrials.gov/show/NCT00749541	Completed	Assaf-Harofeh Medical Center	2009-08-31
NCT00695474	Vitamin D and Type 2 Diabetes - a Cross Sectional Study	https://ClinicalTrials.gov/show/NCT00695474	Completed	University of Aarhus	2009-04-30

Registries

#If less then 500 registries

nct_id	brief_title	link	overall_status	source	primary_completion_date
NCT03344718	Metabolic Syndrome and Vitamin D Level in Old People	https://ClinicalTrials.gov/show/NCT03344718	Completed	National Cheng-Kung University Hospital	2012-08-17
NCT03330301	D-tecting Disease - From Exposure to Vitamin D During Critical Periods of Life	https://ClinicalTrials.gov/show/NCT03330301	Completed	Bispebjerg Hospital	2016-09-30
NCT02351284	Impact of Hypovitaminosis D on Bone Disease in HIV Infected Patients	https://ClinicalTrials.gov/show/NCT02351284	Recruiting	Asociacion para el Estudio de las Enfermedades Infecciosas	2020-07-31
NCT02019836	Comparison of Maternal and Neonatal Vitamin D Levels in Term Neonates With and Without Early Onset Sepsis	https://ClinicalTrials.gov/show/NCT02019836	Completed	Kanuni Sultan Suleyman Training and Research Hospital	2013-01-31
NCT01799655	Does Vitamin D Deficiency Associated With Hypercoagulability & Increased Thrombin Generation?	https://ClinicalTrials.gov/show/NCT01799655	Completed	HaEmek Medical Center, Israel	2014-04-30
NCT04405141	Uroflowmetry Results and Vitamin D Levels	https://ClinicalTrials.gov/show/NCT04405141	Completed	Umraniye Education and Research Hospital	2017-12-30
NCT03734250	D Vitamin Effects on Neuromuscular Blocker Reverse Time	https://ClinicalTrials.gov/show/NCT03734250	Completed	Duzce University	2018-03-01
NCT03652987	Endocrine and Menstrual Disturbances in Women With Polycystic Ovary Syndrome (PCOS)	https://ClinicalTrials.gov/show/NCT03652987	Recruiting	St George’s, University of London	2019-11-30